A curse can only be lifted by luck or an impossible feat, and Aisling has already tried many impossible feats. Every morning she becomes a swan. At sunset, she has a couple of minutes with her beloved, and then the same curse turns him into a raven. When it becomes clear that the curse is directly linked to an ancient, awakening evil, she ventures into the depths of Underhill for answers. Unfortunately, she must make this journey alone.

Bran refuses to believe that there is no other way. Separated from his queen, he teams up with the Seelie fae and druids. Darkness spreads across the Crow Kingdom. The king and queen fight to protect their people, their home and their love for each other.